intro to chemistry

Question

In an experiment, a student transfered 4.50 mL of a liquid into a beaker that weighed 35.986 g when empty. The combined weight of the beaker with the liquid was found to be 40.785 g. What is the density of this liquid? 

Answer 1

In an experiment, a student transferred 4.50 mL of a liquid into a beaker that weighed 35.986 g when empty. The combined weight of the beaker with the liquid was found to be 40.785 g. What is the density of this liquid? 

Density = ^mass/_volume or D = ^m/_V

Given: V = 4.50 mL

mass of beaker = 35.986 g

mass of beaker + water = 40.785 g

Solve for the mass of the water by subtraction:

mass of water = (mass of beaker + water) – (mass of beaker)

mass of water = 40.785 g – 35.986 g = 4.799 g

Density = ^{4.799 g}/_{4.50 mL} = 1.07 ^g/_mL